From 4485cb48007d581cc654923b2a03abfa032089bc Mon Sep 17 00:00:00 2001
From: calvin <calvin@e7d03fd6-7b0d-0410-9947-9c21f3af8025>
Date: Thu, 28 Oct 2004 16:03:42 +0000
Subject: [PATCH] also overload NullTranslations gettext class

git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@1900 e7d03fd6-7b0d-0410-9947-9c21f3af8025
---
 linkcheck/i18n.py | 42 ++++++++++++++++++++++++++++--------------
 1 file changed, 28 insertions(+), 14 deletions(-)

diff --git a/linkcheck/i18n.py b/linkcheck/i18n.py
index 9dd95ae5..29e05758 100644
--- a/linkcheck/i18n.py
+++ b/linkcheck/i18n.py
@@ -25,18 +25,28 @@ import gettext
 supported_languages = ['en']
 default_language = None
 
+def install_builtin (self, do_unicode):
+    """install _() and _n() gettext methods into default namespace"""
+    import __builtin__
+    if do_unicode:
+        __builtin__.__dict__['_'] = self.ugettext
+        # also install ngettext
+        __builtin__.__dict__['_n'] = self.ungettext
+    else:
+        __builtin__.__dict__['_'] = self.gettext
+        # also install ngettext
+        __builtin__.__dict__['_n'] = self.ngettext
+
 class Translator (gettext.GNUTranslations):
 
     def install (self, do_unicode):
-        import __builtin__
-        if do_unicode:
-            __builtin__.__dict__['_'] = self.ugettext
-            # also install ngettext
-            __builtin__.__dict__['_n'] = self.ungettext
-        else:
-            __builtin__.__dict__['_'] = self.gettext
-            # also install ngettext
-            __builtin__.__dict__['_n'] = self.ngettext
+        install_builtin(self, do_unicode)
+
+
+class NullTranslator (gettext.NullTranslations):
+
+    def install (self, do_unicode):
+        install_builtin(self, do_unicode)
 
 
 def init (domain, directory):
@@ -55,15 +65,19 @@ def init (domain, directory):
     else:
         default_language = "en"
     # install translation service routines into default namespace
-    translator = get_translator(domain, directory, default_language)
+    translator = get_translator(domain, directory, fallback=True)
     do_unicode = True
     translator.install(do_unicode)
 
 
-def get_translator (domain, directory, language, translatorklass=Translator):
-    languages = [get_lang(language)]
-    return gettext.translation(domain,
-        localedir=directory, languages=languages, class_=translatorklass)
+def get_translator (domain, directory, languages=None,
+                    translatorklass=Translator, fallback=False):
+    """search the appropriate GNUTranslations class"""
+    translator = gettext.translation(domain, localedir=directory,
+            languages=languages, class_=translatorklass, fallback=fallback)
+    if not isinstance(translator, gettext.GNUTranslations):
+        translator = NullTranslator()
+    return translator
 
 
 def get_lang (lang):